In the face centered cubic unit cell, the radius of atoms in terms of edge length (a) of unit ce...

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In the face centered cubic unit cell, the radius of atoms in terms of edge length (a) of unit cell is
(a) \( \mathrm{a} / 2 \)
(b) \( \mathrm{a} / \sqrt{2} \)
(c) \( \mathrm{a} / 2 \sqrt{2} \)
(d) \( \sqrt{3} \mathrm{a} / 4 \)
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